From: Allison Collins <allison.henderson@oracle.com>
To: linux-xfs@vger.kernel.org
Subject: [PATCH v11 15/25] xfs: Add helpers xfs_attr_is_shortform and xfs_attr_set_shortform
Date: Mon, 20 Jul 2020 17:15:56 -0700 [thread overview]
Message-ID: <20200721001606.10781-16-allison.henderson@oracle.com> (raw)
In-Reply-To: <20200721001606.10781-1-allison.henderson@oracle.com>
In this patch, we hoist code from xfs_attr_set_args into two new helpers
xfs_attr_is_shortform and xfs_attr_set_shortform. These two will help
to simplify xfs_attr_set_args when we get into delayed attrs later.
Signed-off-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Chandan Rajendra <chandanrlinux@gmail.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/libxfs/xfs_attr.c | 107 +++++++++++++++++++++++++++++++----------------
1 file changed, 72 insertions(+), 35 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index f1becca..b828f3b 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -204,6 +204,66 @@ xfs_attr_try_sf_addname(
}
/*
+ * Check to see if the attr should be upgraded from non-existent or shortform to
+ * single-leaf-block attribute list.
+ */
+static inline bool
+xfs_attr_is_shortform(
+ struct xfs_inode *ip)
+{
+ return ip->i_afp->if_format == XFS_DINODE_FMT_LOCAL ||
+ (ip->i_afp->if_format == XFS_DINODE_FMT_EXTENTS &&
+ ip->i_afp->if_nextents == 0);
+}
+
+/*
+ * Attempts to set an attr in shortform, or converts short form to leaf form if
+ * there is not enough room. If the attr is set, the transaction is committed
+ * and set to NULL.
+ */
+STATIC int
+xfs_attr_set_shortform(
+ struct xfs_da_args *args,
+ struct xfs_buf **leaf_bp)
+{
+ struct xfs_inode *dp = args->dp;
+ int error, error2 = 0;
+
+ /*
+ * Try to add the attr to the attribute list in the inode.
+ */
+ error = xfs_attr_try_sf_addname(dp, args);
+ if (error != -ENOSPC) {
+ error2 = xfs_trans_commit(args->trans);
+ args->trans = NULL;
+ return error ? error : error2;
+ }
+ /*
+ * It won't fit in the shortform, transform to a leaf block. GROT:
+ * another possible req'mt for a double-split btree op.
+ */
+ error = xfs_attr_shortform_to_leaf(args, leaf_bp);
+ if (error)
+ return error;
+
+ /*
+ * Prevent the leaf buffer from being unlocked so that a concurrent AIL
+ * push cannot grab the half-baked leaf buffer and run into problems
+ * with the write verifier. Once we're done rolling the transaction we
+ * can release the hold and add the attr to the leaf.
+ */
+ xfs_trans_bhold(args->trans, *leaf_bp);
+ error = xfs_defer_finish(&args->trans);
+ xfs_trans_bhold_release(args->trans, *leaf_bp);
+ if (error) {
+ xfs_trans_brelse(args->trans, *leaf_bp);
+ return error;
+ }
+
+ return 0;
+}
+
+/*
* Set the attribute specified in @args.
*/
int
@@ -212,48 +272,25 @@ xfs_attr_set_args(
{
struct xfs_inode *dp = args->dp;
struct xfs_buf *leaf_bp = NULL;
- int error, error2 = 0;
+ int error = 0;
/*
- * If the attribute list is non-existent or a shortform list,
- * upgrade it to a single-leaf-block attribute list.
+ * If the attribute list is already in leaf format, jump straight to
+ * leaf handling. Otherwise, try to add the attribute to the shortform
+ * list; if there's no room then convert the list to leaf format and try
+ * again.
*/
- if (dp->i_afp->if_format == XFS_DINODE_FMT_LOCAL ||
- (dp->i_afp->if_format == XFS_DINODE_FMT_EXTENTS &&
- dp->i_afp->if_nextents == 0)) {
+ if (xfs_attr_is_shortform(dp)) {
/*
- * Try to add the attr to the attribute list in the inode.
+ * If the attr was successfully set in shortform, the
+ * transaction is committed and set to NULL. Otherwise, is it
+ * converted from shortform to leaf, and the transaction is
+ * retained.
*/
- error = xfs_attr_try_sf_addname(dp, args);
- if (error != -ENOSPC) {
- error2 = xfs_trans_commit(args->trans);
- args->trans = NULL;
- return error ? error : error2;
- }
-
- /*
- * It won't fit in the shortform, transform to a leaf block.
- * GROT: another possible req'mt for a double-split btree op.
- */
- error = xfs_attr_shortform_to_leaf(args, &leaf_bp);
- if (error)
- return error;
-
- /*
- * Prevent the leaf buffer from being unlocked so that a
- * concurrent AIL push cannot grab the half-baked leaf
- * buffer and run into problems with the write verifier.
- * Once we're done rolling the transaction we can release
- * the hold and add the attr to the leaf.
- */
- xfs_trans_bhold(args->trans, leaf_bp);
- error = xfs_defer_finish(&args->trans);
- xfs_trans_bhold_release(args->trans, leaf_bp);
- if (error) {
- xfs_trans_brelse(args->trans, leaf_bp);
+ error = xfs_attr_set_shortform(args, &leaf_bp);
+ if (error || !args->trans)
return error;
- }
}
if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
--
2.7.4
next prev parent reply other threads:[~2020-07-21 0:18 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-21 0:15 [PATCH v11 00/25] xfs: Delay Ready Attributes Allison Collins
2020-07-21 0:15 ` [PATCH v11 01/25] xfs: Add xfs_has_attr and subroutines Allison Collins
2020-07-21 23:26 ` Darrick J. Wong
2020-07-24 2:24 ` Dave Chinner
2020-07-25 2:49 ` Allison Collins
2020-07-21 0:15 ` [PATCH v11 02/25] xfs: Check for -ENOATTR or -EEXIST Allison Collins
2020-07-21 0:15 ` [PATCH v11 03/25] xfs: Factor out new helper functions xfs_attr_rmtval_set Allison Collins
2020-07-21 0:15 ` [PATCH v11 04/25] xfs: Pull up trans handling in xfs_attr3_leaf_flipflags Allison Collins
2020-07-21 0:15 ` [PATCH v11 05/25] xfs: Split apart xfs_attr_leaf_addname Allison Collins
2020-07-21 23:19 ` Darrick J. Wong
2020-07-25 0:07 ` Allison Collins
2020-07-21 0:15 ` [PATCH v11 06/25] xfs: Refactor xfs_attr_try_sf_addname Allison Collins
2020-07-21 0:15 ` [PATCH v11 07/25] xfs: Pull up trans roll from xfs_attr3_leaf_setflag Allison Collins
2020-07-21 0:15 ` [PATCH v11 08/25] xfs: Factor out xfs_attr_rmtval_invalidate Allison Collins
2020-07-21 0:15 ` [PATCH v11 09/25] xfs: Pull up trans roll in xfs_attr3_leaf_clearflag Allison Collins
2020-07-21 0:15 ` [PATCH v11 10/25] xfs: Refactor xfs_attr_rmtval_remove Allison Collins
2020-07-21 23:31 ` Darrick J. Wong
2020-07-22 0:24 ` Darrick J. Wong
2020-07-25 0:08 ` Allison Collins
2020-07-25 0:46 ` Darrick J. Wong
2020-07-25 0:07 ` Allison Collins
2020-07-21 0:15 ` [PATCH v11 11/25] xfs: Pull up xfs_attr_rmtval_invalidate Allison Collins
2020-07-21 0:15 ` [PATCH v11 12/25] xfs: Add helper function xfs_attr_node_shrink Allison Collins
2020-07-21 0:15 ` [PATCH v11 13/25] xfs: Remove unneeded xfs_trans_roll_inode calls Allison Collins
2020-07-21 23:34 ` Darrick J. Wong
2020-07-25 0:08 ` Allison Collins
2020-07-21 0:15 ` [PATCH v11 14/25] xfs: Remove xfs_trans_roll in xfs_attr_node_removename Allison Collins
2020-07-21 23:38 ` Darrick J. Wong
2020-07-25 0:08 ` Allison Collins
2020-07-21 0:15 ` Allison Collins [this message]
2020-07-21 0:15 ` [PATCH v11 16/25] xfs: Add helper function xfs_attr_leaf_mark_incomplete Allison Collins
2020-07-21 0:15 ` [PATCH v11 17/25] xfs: Add remote block helper functions Allison Collins
2020-07-21 0:15 ` [PATCH v11 18/25] xfs: Add helper function xfs_attr_node_removename_setup Allison Collins
2020-07-21 0:16 ` [PATCH v11 19/25] xfs: Add helper function xfs_attr_node_removename_rmt Allison Collins
2020-07-21 0:16 ` [PATCH v11 20/25] xfs: Simplify xfs_attr_leaf_addname Allison Collins
2020-07-21 23:39 ` Darrick J. Wong
2020-07-25 0:07 ` Allison Collins
2020-07-21 0:16 ` [PATCH v11 21/25] xfs: Simplify xfs_attr_node_addname Allison Collins
2020-07-21 23:41 ` Darrick J. Wong
2020-07-25 0:08 ` Allison Collins
2020-07-21 0:16 ` [PATCH v11 22/25] xfs: Lift -ENOSPC handler from xfs_attr_leaf_addname Allison Collins
2020-07-21 0:16 ` [PATCH v11 23/25] xfs: Add delay ready attr remove routines Allison Collins
2020-07-21 0:16 ` [PATCH v11 24/25] xfs: Add delay ready attr set routines Allison Collins
2020-07-21 0:16 ` [PATCH v11 25/25] xfs: Rename __xfs_attr_rmtval_remove Allison Collins
2020-07-24 3:41 ` [PATCH v11 00/25] xfs: Delay Ready Attributes Dave Chinner
2020-07-24 5:35 ` Dave Chinner
2020-07-25 2:50 ` Allison Collins
2020-07-25 2:49 ` Allison Collins
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